Palmyra X5

proprietary

General-purpose model with a 1M token context window and adaptive reasoning

Context
1M
Max output
8K
Input price
$0.6/1M tokens
Output price
$6/1M tokens

Capabilities

Reasoning & Interaction
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming

Details

Model IDpalmyra-x5
Provider Writer
Creator writer
Familypalmyra-x
Licenseproprietary
Statusactive
Typechat
Input modalitiestext, image
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window1M tokens
Max input—
Max output8K tokens
Reasoning tokens—
Knowledge cutoff—
Release date
AWS Bedrock IDwriter.palmyra-x5-v1:0
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Endpoints

Chat CompletionsPOST
Generate chat responses with messageshttps://api.writer.com/v1/chat/completions

Pricing

Input
$0.6
Output
$6
Cache write
—
Cache read
—
Batch in
—
Batch out
—

Family Comparison: palmyra-x

ModelContextMax outPricing
Palmyra X51M8K$0.6$6
Palmyra X61M8K$2$8
Palmyra X4128K4K$2.5$10
Palmyra X 003 Instruct32K4K$7.5$22.5

API

GET/v1/models/writer/palmyra-x5

Palmyra X5

palmyra-x5

General-purpose model with a 1M token context window and adaptive reasoning

Changes · 4 entries
palmyra-x5updateca7a400Nov 2, 2026, 03:02 AM
descriptionWriter's flagship adaptive reasoning model with a 1M-toke...→General-purpose model with a 1M token context window and ...
palmyra-x5update20c73acJul 17, 2026, 02:34 AM
descriptionOur latest and most advanced model→General-purpose model with a 1M token context window and ...
palmyra-x5update80c574aJun 3, 2026, 07:05 AM
descriptionWriter's flagship adaptive reasoning model with a 1M-toke...→Our latest and most advanced model
palmyra-x5create3e56cf1Apr 26, 2026, 07:23 PM